Had 1 bad steel wheel on the 2008 sierra 3500 dually DMax I bought a year or so ago and wanted a spare wheel. Found out (I Believe) the center bore changed in 2007 and changed again in 2011, so I had to find a 2007 to 2010 wheel. Spent months calling junk yards, searching Craigslist and the internet with no luck. Finally found that Dormans sells new ones and ordered 2 from Jegs. Posted this in case anyone else is looking and didn't want to spend $300.00 on a new GM wheel. Dormans part# 939-236 were $116.00 each